Request Quote
(Ships tomorrow)
381LX331M350K452 Equivalent & Substitute Parts
Part Overview
The 381LX331M350K452 is a 330 µF, 350 V aluminum electrolytic capacitor in radial, can snap-in configuration manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, though 1051 pieces remain in stock. The part operates across a temperature range of -25°C to 105°C with a rated lifetime of 3000 hours at 105°C, making it suitable for general-purpose applications requiring stable capacitance and low equivalent series resistance.
Due to the obsolete status of the 381LX331M350K452, identification of equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability. Substitute parts are selected based on matching or exceeding critical electrical parameters including capacitance, voltage rating, ESR characteristics, ripple current handling, and thermal performance specifications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Capacitance | 330 | µF |
| Tolerance | ±20% | — |
| Voltage - Rated | 350 | V |
| ESR @ 120 Hz | 603 | mOhm |
| Lifetime @ 105°C | 3000 | Hrs |
| Operating Temperature Range | -25 to 105 | °C |
| Ripple Current @ 120 Hz | 1.2 | A |
| Ripple Current @ 20 kHz | 1.7 | A |
| Lead Spacing | 10.00 | mm |
| Diameter | 30.00 | mm |
| Height - Seated (Max) | 47.00 | mm |
| Mounting Type | Through Hole | — |
| Package / Case | Radial, Can - Snap-In | — |
| RoHS Status | ROHS3 Compliant | — |
| Product Status | Obsolete | — |
Substitute Part Grouping Explanation
Substitute parts for the 381LX331M350K452 are categorized into three groups based on substitution compatibility:
Direct Substitutes maintain identical electrical specifications (330 µF, 350 V, 3000 Hrs @ 105°C) with matching or superior performance characteristics. These parts are interchangeable in applications where the original part specifications are required.
Upgrade Substitutes provide enhanced voltage ratings (385 V, 400 V, or 420 V) or improved ESR performance while maintaining the same capacitance value and thermal lifetime. These parts are suitable when higher voltage margin or lower impedance is beneficial to circuit performance.
Similar Substitutes share the same capacitance and voltage rating but differ in physical dimensions, ESR values, or thermal lifetime. These parts require mechanical and electrical verification before implementation.
Substitution compatibility is determined by the following critical parameters:
- Capacitance value (330 µF)
- Voltage rating (minimum 350 V for direct substitutes; higher for upgrades)
- Thermal lifetime (3000 Hrs @ 105°C for direct and upgrade substitutes)
- Lead spacing (10.00 mm)
- Mounting type (Through Hole, Radial, Can - Snap-In)
- Package footprint compatibility
Parameter Comparison
| Part Number | Manufacturer | Capacitance (µF) | Voltage (V) | ESR @ 120 Hz (mOhm) | Lifetime @ 105°C (Hrs) | Ripple @ 120 Hz (A) | Ripple @ 20 kHz (A) | Height (mm) | Status | Type |
|---|---|---|---|---|---|---|---|---|---|---|
| 381LX331M350K452 | CDE | 330 | 350 | 603 | 3000 | 1.2 | 1.7 | 47.00 | Obsolete | Main Part |
| 381LX331M350K042 | CDE | 330 | 350 | — | 3000 | 1.2 | — | 42.00 | Active | Direct |
| SLP331M350E5P3 | CDE | 330 | 350 | 1005 | 3000 | 1.34 | 1.97 | 37.00 | Active | Direct |
| 381LR331M420K452 | CDE | 330 | 420 | 402 | 3000 | 1.78 | 2.54 | 47.00 | Active | Upgrade |
| SLP331M385E4P3 | CDE | 330 | 385 | 1005 | 3000 | 1.31 | 1.93 | 47.00 | Active | Upgrade |
| SLP331M400E4P3 | CDE | 330 | 400 | 1005 | 3000 | 1.55 | 2.28 | 47.00 | Active | Upgrade |
| SLP331M420E4P3 | CDE | 330 | 420 | 1005 | 3000 | 1.49 | 2.19 | 47.00 | Active | Upgrade |
| 381LQ331M350K022 | CDE | 330 | 350 | 502 | 2000 | 1.2 | 1.68 | 32.00 | Active | Similar |
| 381LX331M350A022 | CDE | 330 | 350 | — | 3000 | 1.2 | 1.7 | 32.00 | Active | Similar |
| 381LX331M350J052 | CDE | 330 | 350 | — | 3000 | 1.2 | 1.7 | 52.00 | Active | Similar |
| 381LX331M400K452 | CDE | 330 | 400 | — | 3000 | 1.4 | 1.9 | 47.00 | Active | Similar |
Engineering Selection Recommendations
Direct Substitutes (Recommended for Immediate Replacement)
The 381LX331M350K042 and SLP331M350E5P3 are active production parts with identical capacitance, voltage rating, and thermal lifetime specifications. Both are ROHS3 compliant and carry unlimited moisture sensitivity rating (MSL 1). The 381LX331M350K042 maintains the same series designation and physical footprint compatibility with the original part, differing only in seated height (42.00 mm versus 47.00 mm). The SLP331M350E5P3 offers improved ripple current handling at both low and high frequencies and is available in bulk packaging.
Upgrade Substitutes (For Enhanced Performance)
The 381LR331M420K452, SLP331M385E4P3, SLP331M400E4P3, and SLP331M420E4P3 provide voltage ratings exceeding the original 350 V specification. These parts are suitable for applications requiring increased voltage margin or where circuit design permits higher voltage-rated components. The SLP series parts (385 V, 400 V, 420 V) feature lower ESR (1.005 Ohm @ 120 Hz) compared to the original part (603 mOhm @ 120 Hz), resulting in improved ripple current performance. All upgrade substitutes maintain the 3000-hour thermal lifetime at 105°C and are ROHS3 compliant.
Similar Substitutes (Conditional Use)
The 381LQ331M350K022, 381LX331M350A022, 381LX331M350J052, and 381LX331M400K452 share the same capacitance and voltage specifications but differ in physical dimensions or thermal characteristics. The 381LQ331M350K022 operates at reduced thermal lifetime (2000 Hrs @ 105°C) and is suitable only for applications with lower thermal stress requirements. The 381LX331M350A022 and 381LX331M350J052 offer alternative physical dimensions (32.00 mm and 52.00 mm heights, respectively) for space-constrained or extended-height applications. The 381LX331M400K452 provides a 400 V upgrade option with identical physical dimensions to the original part.
All recommended substitutes are active production parts with ROHS3 compliance and REACH unaffected status, ensuring regulatory compliance and long-term availability.
Frequently Asked Questions (FAQ)
Q: Can the 381LX331M350K042 be used as a direct replacement for the 381LX331M350K452?
A: Yes. Both parts share identical electrical specifications: 330 µF capacitance, 350 V voltage rating, ±20% tolerance, and 3000-hour thermal lifetime at 105°C. The primary difference is seated height (42.00 mm versus 47.00 mm). Verify that the reduced height does not conflict with circuit board layout or component clearance requirements before implementation.
Q: What is the advantage of using SLP331M400E4P3 instead of the original 381LX331M350K452?
A: The SLP331M400E4P3 provides three key advantages: (1) higher voltage rating (400 V versus 350 V), providing increased voltage margin; (2) lower ESR (1.005 Ohm @ 120 Hz versus 603 mOhm @ 120 Hz), resulting in improved ripple current performance; and (3) active production status with guaranteed long-term availability. The part maintains identical capacitance, thermal lifetime, and physical footprint compatibility.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All substitute parts listed are ROHS3 compliant and carry REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and use.
Q: Can the 381LQ331M350K022 be used in applications requiring 3000-hour thermal lifetime?
A: No. The 381LQ331M350K022 is rated for 2000 hours at 105°C, which is 1000 hours less than the original part. This part is suitable only for applications with lower thermal stress or shorter operational lifetimes. For applications requiring 3000-hour thermal lifetime, use direct or upgrade substitutes.
Q: What is the difference between direct substitutes and upgrade substitutes?
A: Direct substitutes (381LX331M350K042, SLP331M350E5P3) maintain the original 350 V voltage rating and 3000-hour thermal lifetime, providing equivalent performance. Upgrade substitutes (381LR331M420K452, SLP331M385E4P3, SLP331M400E4P3, SLP331M420E4P3) provide higher voltage ratings (385 V to 420 V) and/or improved ESR characteristics, offering enhanced performance margins. Upgrade substitutes are suitable when circuit design permits higher voltage-rated components or when lower impedance is beneficial.
Q: Do all substitute parts use the same lead spacing and mounting type?
A: Yes. All substitute parts maintain 10.00 mm lead spacing and through-hole radial, can snap-in mounting configuration, ensuring mechanical compatibility with the original part's PCB footprint.
Q: Which substitute part offers the best ripple current performance?
A: The SLP331M420E4P3 provides the highest ripple current ratings among upgrade substitutes: 1.49 A @ 120 Hz and 2.19 A @ 20 kHz. For direct substitutes, the SLP331M350E5P3 offers superior ripple current performance (1.34 A @ 120 Hz, 1.97 A @ 20 kHz) compared to the original part (1.2 A @ 120 Hz, 1.7 A @ 20 kHz).
Q: Can substitute parts with different physical heights be used interchangeably?
A: Physical height differences require verification of circuit board layout, component clearance, and thermal management considerations. The 381LX331M350K042 (42.00 mm height) is shorter than the original part (47.00 mm), while the 381LX331M350J052 (52.00 mm height) is taller. Confirm that height variations do not conflict with adjacent components, enclosure constraints, or thermal dissipation requirements before implementation.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts